Silver(I) Coordination Polymers of Fluorescent Oligo(phenylenevinylene) with π−π Stackings: Luminescence and Conductivity

Three luminescent silver(I)−oligo(phenylenevinylene) complexes, [Ag2(bmsb)(ClO4)2] (1), [Ag2(bmsb)(H2O)4](BF4)2
(2), and [Ag2(bdb)(CF3SO3)2] (3) (bmsb = 1, 4-bis(methylstyryl)benzene, bdb = 4,4‘-bis(2, 5-dimethylstryryl)biphenyl),
have been synthesized and structurally characterized. Complexes 1 and 2 are 2D networks with unique
metallocyclophane motifs. Complex 3 affords a 2D zigzag sheet, in which silver triflates form tubelike double chains
and bdb molecules act as linkages. Complex 2 exhibits high electric conductivity because of columnar aromatic
stackings formed through intra- and intermolecular π−π interactions. Complexes 1−3 in the solid state exhibit
luminescence, of which excitation and emission maxima are shifted to longer wavelength as compared to those of
the corresponding metal-free ligands.